diff --git a/ebook_converter/ebooks/htmlz/oeb2html.py b/ebook_converter/ebooks/htmlz/oeb2html.py
index 9684723..d2aebe6 100644
--- a/ebook_converter/ebooks/htmlz/oeb2html.py
+++ b/ebook_converter/ebooks/htmlz/oeb2html.py
@@ -16,13 +16,13 @@ import re
 from functools import partial
 from lxml import html
 
-from calibre import prepare_string_for_xml
-from calibre.ebooks.oeb.base import (
+from ebook_converter import prepare_string_for_xml
+from ebook_converter.ebooks.oeb.base import (
     XHTML, XHTML_NS, SVG_NS, barename, namespace, OEB_IMAGES, XLINK, rewrite_links, urlnormalize)
-from calibre.ebooks.oeb.stylizer import Stylizer
-from calibre.utils.logging import default_log
-from polyglot.builtins import unicode_type, string_or_bytes, as_bytes
-from polyglot.urllib import urldefrag
+from ebook_converter.ebooks.oeb.stylizer import Stylizer
+from ebook_converter.utils.logging import default_log
+from ebook_converter.polyglot.builtins import unicode_type, string_or_bytes, as_bytes
+from ebook_converter.polyglot.urllib import urldefrag
 
 SELF_CLOSING_TAGS = {'area', 'base', 'basefont', 'br', 'hr', 'input', 'img', 'link', 'meta'}
 
diff --git a/ebook_converter/startup.py b/ebook_converter/startup.py
index beb9bf8..efc54dc 100644
--- a/ebook_converter/startup.py
+++ b/ebook_converter/startup.py
@@ -200,10 +200,10 @@ if not _run_once:
 
     builtins.__dict__['lopen'] = local_open
 
-    from ebook_converter.utils.icu import title_case, lower as icu_lower, upper as icu_upper
+    from ebook_converter.utils.icu import lower as icu_lower, upper as icu_upper
     builtins.__dict__['icu_lower'] = icu_lower
     builtins.__dict__['icu_upper'] = icu_upper
-    builtins.__dict__['icu_title'] = title_case
+    builtins.__dict__['icu_title'] = lambda s: ' '.join([x.capitalize() for x in s.split(' ')])
 
     def connect_lambda(bound_signal, self, func, **kw):
         import weakref